Sound recording on film



June 13, 1933. w HQWEY 1,913,446

SOUND RECORDING ON FILM Filed July 1, 1950 I nventqr Attorney Patented June 13, 1933' HOWEY, or gmw YORK, 11.; Y.

. I soon!) nnconnmeon FILM Application filed m 1,

My invention relates to improvements in sound recordmg on films, and tmore especially consists of the featurespointed outin the claims. L up I The purpose of my invention is to provide j a sound recording system that is of small bulk, of great ruggedness and sensitivity; that may be used in the studio or for portableisound recording simultaneously with the photographing ofthemoving subjects; that because of its few moving parts andthe steadiness and intensity of the light source makes it especially available for situations that atpresent are difficult to handle; and that may with equal facility use illumination varying from ultra violet toiinfra red so as tocoordinate the system for that portion of the spectrum to which the coating of the film maybe specially sensitive.

With these and other ends in view, I illustrate in the accompanying drawing such instances of adaptation as will disclose the broad underlying features without limiting myself to the specific details shown thereon and described herein. f Figure 1 is a diagrammatic view of the recording system.

Fig. 2 is adetached diagrammaticview of P a quartz recorder. R f

uses of studio, station or special emergencies, Imay utilize Wh atever alternatives or equivalents of structure and cooperating steps that i the exigencies of varying conditions may de- 0 mand without departing from the broad spirit of my invention.

I In my recording system I make use of the unique characteristic of a quartz rod, or a quartz filament, or quartz filaments, or a cone through the quartz material and onto a sensiti zed receiving film as a diminutive point of light, the quartz element being suitably pivoted and acted upon by varying electric ourrent so as to cause the end which is adjacent In adapting my invention to the different shaped .or tapering quartz rod so mounted as to convey light from any desired source 1930. SeriaI No. 465,191.

i In Fig. 1 the sound receivingdevice may be an ordinarymicrophone suitably connected to a source of current (not shown) which under the varying vibrations of'sound will im press such vibrations on an amplifying cir cuit. Thecurrent so amplified will cause the electromagnetic control to vibrate the small end of the quartz recorder in accordwith the characteristic of thesound impressed ontne receiving microphone so as to produce a sound track record on the movie film in motion adjacent the small end ofthe recorder. The oscillations of the point of light conveyed "through the quartz element will produce lights and shades on the sensitive filmof varying area to correspond with the frequencies and amplitudes of the impressed sound currents. ."The uartz recorder shown diagrammatically in ig. 2 may be pivoted atits large end to a hoodedor enclosed source of light, and asstated, the small or pointedend of the conically shaped rod of fused quartz will be vibrated according to the characteristics of the vibrations to whichthe receiving microphone is subjected. This vibration may be effected electromagnetically in any desired nn ehwq A source of light 1 is enclosed in any de- 7 The illumination from the source of light; 3 1

1 engages the flattened end 11 of the quartz element 4. A movie film 5is arranged in any well [known manner to pass adjacent the small end 12 of the quartz element 4 so that a sound track will be formed onitadj acent to 90 and simultaneous with the exposure of the usual movie film. Inthis way the vibrations impressed upon the receiving. microphone, 9 transmitted through the amplifying system 8 are recorded on the movie film. V I I do not limit myselftoany specific form of electromagnetic control of the quartz element as it may take on the characteristics of dynamic or other forms ofloud speakers or the quartz element maybe set into variable sired form ofhood2 into which the conical end 10 of the quartz element 4 projects. The

vibration by any desired form of electrostatic control.

It is obvious that a quartz element at once provides a sound recording system that is compact, simple, quite rugged and easily controlled so that it is especially adapted to studio or portable recording purposes.

What I claim is:

1. A sound recording system comprising asource of light, a light sensitive medium, a tapered quartz filament adapted to collect light from the source and conveyfit to the light sensitive medium in the form of a po nt of light, and magnetic means for vibratingthe quartz filament at a point adjacent the light sensitive medium in response to -a suitable sound pickup and amplified output system. I

2. In sound recording systems, in combination, a traversing photo-sensitized film adapted to receive and record a sound track, a sound pickup, an amplifying system adapted to convert the sound vibrations into electrical vibrations, a source of light, a quartz rod, so mounted as to convey light from the source, and means for causing the electrical vibrations to control the movement of the quartz rod at a point adjacent the traversing film to produce an oscillographlc recording of the sound vibrations upon the film.

3. In sound recording, in combination, a photo-sensitized material adapted to receive a sound track, means for moving the photosensitive material to provide for continuous recording of an oscillographic sound image, a fixed source of light, a sound pickup and amplifying system, a motor comprising an for vibrating the quartz filaments at the focusing points adjacent the traversing film so as torecord a sound track responsive to the output of the sound pickup system.

6. In a system of the class described, a source of light, a traversing light sensitive film, means for masking the light rays from the light sensitive film, a quartz filament, means for collecting part of the light rays and leading them through the quartz filament onto the light sensitive film, a sound pick-up, an amplifying system, and means for oscillating the quartz filament by the output of the amplifying system at the end adjacent the film so as to produce an oscillographic record of the sound on the film.

7. In a sound recording system of the class described, a source of light, a photosensitive material, a quartz filament interposed between the light source and the photo-sensitive material, means for causing the light passing through the quartz filament to be brought to a focus on the photo-sensitized surface, a suitable sound pickup comprising the input of an amplifying system, a magnetic motor which Will Vibrate in response to the output of the amplifying system and means for causing the vibrations of the magnetic motor to be transmitted to the quartz filament at the end adjacent the film, so as to record on the film an oscillographic image of the sound.

In testimony whereof I afiix my signature.

WALTER-Howler.

armature in the output of the amplifying system modulated by the output, aquartz rod pivotally mounted with one end adjacent the source of light and thefree end adj acent. the

photo-sensitive material, and means for causing the armature to actuate the free end to produce a light and shade recording of the sound image upon the traversing photo-sensitized material. i

4. In sound recording, in combination, a source of light, a light sensitive medium, a

quartz filament leading from the light source to the moving photo-sensitized recording medium, and means for osclllating the free end 1 of the quartz filament adjacent the light sensitive surface to produce a light and shade recording of light passing throughfthe' quartz filament suitable for sound reproduction. I

5. In sound recording, in combination, a

traversingphoto-sensitized film adapted to receive a sound track, a source of light, means for masking the light from the film, means for collecting part of the light and leading it through a plurality of quartz fila-. ments to a-corresponding number of points adjacent the photo-sensitive film, a sound pickup and amplifying system, and means 

